MasterCool 900596366 Bedienungsanleitung Seite 2

2. CHECKING OIL LEVEL
a. Open the gas ballast valve (small brass fitting located next to the handle) one turn.
Do not remove! (3, 6 CFM)
b. Start pump and run with intake port capped for about two minutes. Observe the oil level with
the pump running. The oil level in the sight glass should be even with the level line.
c. If the level is low, open the intake port and run pump for 15 seconds, stop pump and observe
oil level again. Add a small amount of oil as needed.
3. GAS BALLAST VALVE (3, 6 CFM ONLY)
The gas ballast valve must be opened 1/4 turn for the first part of the evacuation procedure. This will help to
eliminate moisture and the life of the vacuum pump. After about two minutes close the valve and continue
the evacuation procedure to reach ultimate vacuum. Failure to close the valve completely during the final
evacuation will result in high vacuum reading.
During the first stages of evacuation, vapors are highly concentrated. Unfortunately, some vapors will con-
dense into a liquid and mix with the oil, thus reducing the oil's ability to produce a deep vacuum. The GAS
BALLAST VALVE emits a controlled amount of dry air into the pump during compression to minimize this
effect and keep oil relatively clean during the first part of the evacuation.
Periodically remove the Gas Ballast Valve Needle and clean or replace the O-ring. Clean mating surfaces and
lightly coat with vacuum pump oil before securely retightening.
4. CHANGING OIL
In order to reach the deep vacuum required, your vacuum pump needs clean, moisture-free oil during
evacuation. Dirty oil becomes a mixture of corrosive acids and water that effects the pump's ability to pull
a deep vacuum. Left sitting in the pump, this sludge will rust and erode internal surfaces...shortening the
pump's life.
• Care should be taken to avoid contact of oil with skin or eyes.
• OIL MAY BE HOT!
• Used oil should be properly disposed of in a leakproof corrosive-resistant container
according to local regulations.
a. After every evacuation, while the pump is warm and oil is thin, take a small sample of oil from
the drain port.
b. If the oil is contaminated, drain the oil by placing the pump on a level surface and opening the
oil drain valve. Catch the waste oil in a container and properly dispose of it.
c. If the pump has been sitting for more than one month, the oil is considered contaminated
regardless of appearance and should be changed as outlined above.
d. To add oil, close drain, remove the oil fill cap and fill to the Oil Level Line with fresh oil.
5. INTAKE CONNECTIONS
Replace all caps and finger-tighten. Do not use caps with damaged or missing O-rings and always store
vacuum pump with capped ports to prevent dirt and moisture contamination.
6. PUMP MOTOR
The PUMP and OIL must be above 30˚F.
The line voltage must be equal to the rating on the motor nameplate ±10%.
Normal operating temperature is approximately 160˚F, which is HOT to the touch! Line voltage and ambient
temperature will affect the normal operating temperature somewhat. Your vacuum pump is designed for
continuous duty and will run for extended periods without overheating.
The motor has an automatic resetting overload protection feature. If the motor will not restart the pump
after shut-off, it may have opened the thermal protection. Disconnect the pump from the system, wait about
15 minutes for the motor to cool down and then try again.
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